Draw frame



E. BASSO DRAW FRAME Filed Oct. 21. 1921 Patented Aug. 26, 1924.

UNITED STATES PATENT OFFICE.

ERNESTO BASSO, F VIGEVANO, ITALY, ASSIGNOR TO THE SOCIE'IA ITALIANA IBRE VETTI PER FILATURA, BERTULETTI & 0., OF MILAN, ITALY, A COMPANY OF ITALY,

DRAW FRAME.

Application filed October 21, 1921. Serial No. 509,412.

To all whom it may concern: By thus gearing the shafts together the Be it known that I, ERNnsTo Basso, subshaft 3 will have the greatest speed, and the ject of the King of Italy, residing at Vigeshaft 2 will have a speed intern'iediate of vano, in the Kingdom of Italy, have inventthat of the shafts 1 and 3. In other words, ed certain new and useful Improvements in such a velocity will be imparted to the shaft Draw Frames, of which the following is a 2 as to obtain a first stretching of the fibres specifi ation, in the ratio of 1 8, for instance, on the pas- As is well known, in the drawing frames sage from the rollers on shaft 1 to the rollat present in use the trouble is frequently ers on shaft 2, whilst owing to the maximum experienced that the fibres break andv as a speed imparted to the shaft 3 by the gear consequence the yarn turned out is uneven pair 8, 9 the stretching on the passage from and defective in strength. This is due to the rollers on shaft 2 to the rollers on shaft the fact that the drawing of the sliver main- 3 is proportionately reduced from 20 to 8. 1y occurs on the passage from the second to In this way the stretching of the sliver is the third rollers, owing to the rate of speed performed in two successive stages and the at which the said rollers revolx e with respect fibres are no longer subjected to excessive to one another. strain.

The object of the invention is to overcome The novel arrangement can be fitted to this objection and to this end I distribute existing drawing frames without need of rethe drawing of the fibres between the seV placing the rollers or shifting the shafts eral rollers, so that they will not be subjectnearer to one another; the alteration of exed to excessive strain. isting plants can therefore be carried out at In the accompanying drawing forming a minimum cost. a part of this specification, a plan View of Having now particularly described and a portion of a drawing frame having the imascertained the nature of my said invention,

provement applied, is shown. and in what manner the same is to be per- Referring to the drawing 1, 2 and 3 repformed, I declare that what I claim is: resent the roller-carrying shafts, upon each In a drawing frame, the combination with of which is a plurality of rollers as usual. the roller-carrying shafts, of a pinion on the It is to be understood that shafts with rollthird shaft, a driven gear wheel meshing ers are arranged below the shafts 1, 2 and 3. with the pinion, a pinion carried by the gear On the shaft 3 is a pinion 9 with which wheel, two gears of unequal size on the first meshes the gear wheel 8 driven by any s'nitshaft and with the larger one of which the able means. The shaft 8 of the gear wheel pinion carried by the driven gear wheel S carries the pinion 8, which meshes with meshes, a counter shaft, two gears of unthe gear wheel l" on the shaft 1. On the equal size on the counter shaft and with shaft 1 is another gear wheel f, wljiich is the smaller one of which the smaller gear smaller than the gear wheel 45 and which wheel of the first shaft meshes, and a pinion meshes with the gear wheel 6 of a multiplyon the second shaft and with which the 40 ing gear A on the counter shaft B. The larger gear wheel of the counter shaft multiplying gear A consists of two gears 6 meshes. and 7 of unequal size, and the larger gear Signed at Milan (Italy), this 4th day of wheel 7 meshes with the pinion 5 on the ()ctober 1921. shaft 2. ERNESTO BASSO. 

